I was dismantling an iPhone 2G when this little bugger dropped out of the bottom portion of the phone. Seemed like it came from the antenna covering, as I do not believe that I had the rear casing off yet. It's a hard plastic, looks like it's an actual part and not something that just broke off. If it helps any, my home button has not worked since it broke off. On that same note, which cable ribbon is responsible for the home button? Sorry for the terrible picture - courtesy of the iPhone 4S. It's sort of shaped like an 'L'